A Study of the Friction of Oil Control Rings Using the Floating Liner Engine

Westerfield, Zachary; Liu, Yang; Kim, Dallwoo; Tian, Tian

doi:10.4271/2016-01-1048

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…13,14 and Westerfield et al. 15 used a floating liner engine to study the piston ring frictional behavior under motored and fired conditions with different engine speeds, ring designs, lubricants, and liner surfaces. Gore et al.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al 9,10 developed a TLOCR deterministic model to simulate the hydrodynamic pressure and shear stress between a TLOCR land and a rough liner based on the deterministic calculation method introduced by Li et al 11 Liu 7 extended the deterministic calculation method to the top two rings based on Li's 12 multiphase deterministic model. Liao et al 13,14 and Westerfield et al 15 used a floating liner engine to study the piston ring frictional behavior under motored and fired conditions with different engine speeds, ring designs, lubricants, and liner surfaces. Gore et al 16,17 conducted a more recent floating liner measurement of friction under both motored and fired conditions.…”

Section: Introductionmentioning

confidence: 99%

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A comprehensive study of the effects of honing patterns on twin-land oil control rings friction using both a numerical model and a floating liner engine

Liu

Kim

Westerfield

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Engine bores are finished with a multi-stage honing process and the finished surface roughness contributes significantly to the piston ring hydrodynamic pressure generation, especially for twin-land oil control rings whose land profile is parallel to the liner surface. In this paper, five different honing patterns on a cast iron liner and one on a spray-coated aluminum liner are studied with a floating liner engine and numerical models. The liner temperature and engine speed were varied such that all the lubrication regimes, namely boundary, mixed, and fully hydrodynamic, are present. It is found that the models based on deterministic approach with a patch of carefully measured liner roughness can match the trend of the Stribeck curves for different liner finishes observed in the experiment. Furthermore, the results show that the roughness height and structure of the honing affect the twin-land oil control rings lubrication differently. With the same honing structure, although rougher liner experiences mixed and boundary lubrication in larger range of Gumbel–Hersey number, it renders less friction than the smoother ones in the hydrodynamic regime. With the same plateau roughness height, a more continuous plateau can provide more flow resistance and thus generate higher hydrodynamic pressure at the ring–liner interface and less friction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comprehensive study of the effects of honing patterns on twin-land oil control rings friction using both a numerical model and a floating liner engine

Liu

Kim

Westerfield

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

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show abstract

“…In overcoming the design challenges discussed above, researchers have adopted a range of designs in floating-liner equipment [14,35,46,[54][55][56][59][60][61][62][63][64]. In this section, various approaches to designs have been examined and classified into three categories named Alpha, Beta, and Gamma.…”

Section: Discussion: Major Configurations Of Floating-liner Techniquesmentioning

confidence: 99%

A Critical Review of Approaches to the Design of Floating-Liner Apparatus for Instantaneous Piston Assembly Friction Measurement

et al. 2021

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Several approaches have been developed to measure instantaneous friction between the piston assembly and cylinder in internal combustion (IC) engines, such as floating-liner, reciprocating liner, instantaneous mean effective pressure (IMEP), fixed sleeve, and (P-ω) method and tribological bench tests. However, the “floating-liner method” and the “(IMEP) method” are the most common methods used to measure instantaneous friction between the piston assembly and IC engines. This paper critically evaluates different approaches to the design of the “floating-liner”. The paper begins by discussing piston assembly frictional losses and their significance and then discuss the development of instantaneous piston-friction measurements. After that, it reviews the main design challenges in the floating-liner approach. “Methods of cylinder sealing” and “force balancing methods” are also reviewed. Design challenges associated with firing operation were presented. Floating-liner designs were classified into different categories with a detailed presentation of the features of each. The paper ends by presenting a range of broad recommendations for further work which would benefit future designs.

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“…The theories can also be applied on the top compression ring and oil control ring as well and the details of the ring dynamics models can be found from Refs. [15][16][17][18][19][20].…”

Section: Ring Pack Dynamicsmentioning

confidence: 99%

“…This will prevent reverse blowby, which is beneficial for oil consumption. More discussions about ring pack dynamics can be found from Refs [17][18][19][20].…”

Section: Ring Pack Dynamicsmentioning

confidence: 99%

Power Cylinder System for Internal Combustion Engines

Cheng¹

2018

Improvement Trends for Internal Combustion Engines

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Piston ring pack is one of the most critical components for engine performance, durability, and emission. It has become a decisive factor for engine life. From previous study, a three-dimensional ring model has been developed using finite element method to study the interactions between the ring-cylinder liner and the ring-groove side interfaces. The ring-cylinder and ring-groove side contacts are modeled using finite element method based on penalty method optimization algorithm. Ring deformation, reaction forces at the ring sides and ring face, and the twist angles along the entire ring circumference are obtained from the model. However, the dynamic behavior of the ring is still less understood. In this study, the dynamic response of the ring over an engine cycle is studied for a second compression ring with a non-symmetric cross section.

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A Study of the Friction of Oil Control Rings Using the Floating Liner Engine

Cited by 16 publications

References 11 publications

A comprehensive study of the effects of honing patterns on twin-land oil control rings friction using both a numerical model and a floating liner engine

A comprehensive study of the effects of honing patterns on twin-land oil control rings friction using both a numerical model and a floating liner engine

A Critical Review of Approaches to the Design of Floating-Liner Apparatus for Instantaneous Piston Assembly Friction Measurement

Power Cylinder System for Internal Combustion Engines

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